Offsetting barometric pressure for location / altitude

Hello community. My first post and query. I have an Aqara temperature / humidity / barometric pressure sensor operating via ZHA and I want to offset the pressure for altitude. I’ve read posts such as How can I get my Aqara Temperature / Humidity sensor to read the barometric pressure? but I can’t figure out if I should substitute the template or add it to the existing yaml config. My current syntax for the Aqara sensor is this:

  • type: entities
    entities:
    - entity: sensor.lumi_barometric_pressure_pressure
    name: Pressure
    - entity: sensor.lumi_barometric_pressure_temperature
    name: Temperature
    - entity: sensor.lumi_barometric_pressure_humidity
    name: Humidity
    - entity: sensor.lumi_barometric_pressure_battery
    name: Battery
    title: Shed
    state_color: true

Could anyone help to get the right syntax? Thanks